JPS5859152A - Grasper of sheet treatment device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to gripping members for use in printing and folding machines and other sheet processing equipment, and more particularly to gripping members for non-slidingly engaging and clamping one or more sheets of paper. It is related to

In a printing machine that supplies web paper, ↑! Several copies may be printed simultaneously on four consecutive sheets of sheet material. This paper roll is cut into strips into ribbons.

These are printed on the product sheet and numbered 1111.
! #r will be done. The cut sheets are transferred to a collecting cylinder of the folding machine, which grips the sheets and transfers them to the other cylinders. This folding machine then folds the product at an appropriate position νJ before performing the binding operation. The ability of the collection cylinder to continuously feed the intermediate product directly to the dejaw cylinder that feeds the final product from the printed web is required and is referred to as "direct feed." Two or more intermediate products may be collected and the collected products may be transferred to a jaw cylinder.

This is called "2 collections" or 18 collections. The collection cylinder must be capable of handling products that differ in size and number of sheets, which is a product.

The collecting cylinder of the folding device has a grasping device which is fixed on the axial direction of its surface.

This grasping device clamps the paper sheet onto the surface of the cylinder during the folding operation. Each grasping device is rotatably mounted within the collection cylinder and actuated by a cam at predetermined time relationships.

A rotary folding machine for a printing press disclosed in co-pending U.S. application No. 1F1,407 filed on June 8, 1981 is capable of changing the product delivery mode and handling products with various large holes. The new collection cylinder is equipped with a new collection cylinder that can be easily and quickly processed. United States Application No. 27140? A collection cylinder, which typically has a number of spaced pairs of gripping devices around its outer periphery, is incorporated into this specification, as disclosed in the specification of the US Pat.

It is essential that the gripping device used in the collection cylinder of the folding rock be securely clamped onto the surface of the paper sheet cylinder. When changing the position of the product on the collection cylinder, this product folds in an incorrect position, thus spoiling the final result. In addition, if the product slides along the surface of the collecting cylinder
If so, alignment of the front and back printing surfaces of the sheet will not be achieved,
A further undesirable end result occurs.

Eight types of gripping devices have been developed for use in folding machines. In the spring-type gripping device, the elastic gripping device fixed to the rotating shaft rotates the fixed clamping of the cylinder to the surface and engages t7, acting as a spring to clamp the product to the cylinder. In a rigid gripping device, the non-resilient gripping device is rigidly attached to the pivot shaft and rotates into engagement with a spring-loaded clamping surface on the cylinder. The structure of existing tcflIN devices causes significant damage to various parts and requires frequent maintenance. In this structure, when the elastic clamping force is increased, the grasping member tends to slide on the grasped surface, which changes the position of the product and deteriorates the folding of the sheet and the alignment of the printed surface of the sheet. Many such known gripping devices must be readjusted each time it is necessary to select a print of a different thickness.

In the eighth type of grasping mechanism, a rigid grasping device that engages with the rigid surface of the 7th ring (#-1 is not fixedly attached to the middle ten, but is rotatably attached. This grasping device is The pivot shaft is biased by a spring on the pivot shaft, and even when the pivot shaft rotates and the gripping device engages a fixed clamping surface, the pivot shaft will be subject to the force of the spring-biased spring-spring mechanism. The increased spring force is transferred to the rigid clamping surface through a rigid gripping device. This device, shown in U.S. Pat. Although it is possible to create a static engagement, the structure is more complex than the previously described attachments and is prone to wear by design.

The present invention is a new and improved grasping device for use in printing folding machines or other sheet processing machines that can be used to clamp sheets of paper in a collecting cylinder,
This geometry provides pressure on the seat so that the gripping member engages without sliding.

It is an object of the invention, in particular, to provide a gripping device which can be mounted on the collecting cylinder of a folding machine. The boulder is mounted on a pivot axis attached to the collecting cylinder for rotation about an axis parallel to the pivot axis of the collecting cylinder. The elastic grasping fingers are attached to the holder by protruding outward from one point on the holder. Position the grasping fingers so that the grasping device # engages the clamping surface, which is the characteristic part or surface part of the collecting cylinder.

When a product is gripped or "removed" by the gripping device, the shaft of the holder is rotated to move the gripping tip to open and close the gripping device.

This opening and closing operation is then repeated at a later point where the product is released into the cylinder. Preferably, the clamping surface is angled or inclined towards the gripping point -π, so that the gripping tip approaches the clamping surface at an acute angle.

In the present invention, the gripping tip and the elastic fingers attached to the holder are usually positioned along a common radius of the arc of rotation passing through the pivot axis of the holder, for example. Therefore, the grasping fingers are on the surface VC.
When rotated into engagement, the geometry of the device is properly defined to increase the elastic holding force of the -C fingers against the surface so that even further rotation of the holder about its axis does not result in a force on the grasping tip. I wonder if it doesn't give any motion component in the radial direction, and the grasping force is iv! The 4th, 17th, and 7th ends should remain almost silent on the surface.

Preferably, the grasping fingers are at least partially curved to provide longitudinal extension of the fingers and to compensate for rotational movement of the holder. In one type, the grasping fingers are approximately Z-shaped, with oppositely curved portions (the portions constituting 2) located on both sides of the radius of the tip. The upper and lower fingers of 2 are bent at angles other than 90° to the radius of the tip so that the curvature flexes or arches upon engagement of the tip with the clamping surface. An effective bend is therefore created to compensate for the extension of the grasping fingers.

As mentioned above, further rotation of the holder after the tip engages the clamping surface imparts no or only a small radial component of motion to the tip, so that the movement of the same point of engagement from the grasping tip does not result in the necessary The tip only needs to compensate for the slight elongation caused. In other words, the deflection pulls the pivot point slightly away from the tip, but the deflection itself imparts movement to the tip. Therefore, the result is an engagement without sliding.

Preferably the clamping surface extends below the cylindrical surface of the collecting cylinder. ! Tilt it. Thus, when the gripping tip is moved to engage this inclined surface, the gripping tip meets the surface and the paper at an obtuse or approximately right angle -'II). Further, once grasped, the sheet is placed below the surface of the cylinder and removed from the air flow, that is, rolled into the nine cavities. The slope of the clamping surface below the outer cylinder surface causes a moderate *m between the paper and the cylinder by wrapping around the leading edge of the paper or #ll bevel.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The sheet processing pupil grasping device of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows part of the collecting cylinder 10 of the folding device. This collecting cylinder 10 rotates about its axis in the direction of the arrow lz. Simultaneous factory release in the United States by the applicant
In this way, the printed web after passing through the printing press is cut into ribbon-like lengths and cut into medium-length products. That is, the ribbon is cut into four-fold O sheets. Each intermediate product is fed separately to the collecting cylinder 10. The intermediate product contacts the collection cylinder.

After traveling with this cylinder in turn, the gripping device #14 located at a predetermined position under the leading edge of the intermediate product opens and then closes to grasp the leading edge of the intermediate product. After the intermediate product is removed by gripping device #14, it is conveyed around the collecting cylinder to a jaw cylinder, not shown, by a tacker mechanism, not shown.

Each grasping device #14 has three 811+18 collecting cylinders lO
The housing 16 is fastened to the housing 16. A pair of end plates 20 (
rdLh (only one is shown in the diagram) supports a lateral gripping shaft z2, which supports a series of holders 24. Each holder z4 is in the form of a bracket that is fastened to the grasping shaft 22 with a screw 25, and is arranged so as to support the grasping 26. This grasping 2fl is continuous, and bolt 2
8 and attach it to the holder 24 through 29vc. The gripping shaft 22 of the gripping device projects through the bearing of the ring plate zO 1, cam follower member 2? Hold the lever 27 that supports A.

Simultaneous pending application by the applicant! In the preferred device illustrated and detailed in Figures 271 and 407, the rotation of the grasping shaft z2 is controlled by a pair of cam followers 1 instead of a single cam follower #a member. These two cam driven members are connected to a rotating shielding cam 8o having a cam surface ROa and a grasping cam (not shown)
Controlled by a pair of cams. As shown in Figure 1, the cam driven member 2? The inward movement of A is caused coincidentally with the rotation of the holder 24 and the gripping 2fl from which the slanted edge or clamping of the gripping device 14 is rotated away from the surface 82. Similarly, outward movement of follower member 217A causes the tip 84 of grasping 36 to pivot around an arc so that the clamp engages surface 8BVC.

As shown in Fig. m1, the grasping 2tl protrudes from the rigid holder 24 at a point 8fl, and this point 8fl forms a bending point for the grasping 2fi having spring properties. This bending point 8fl and the grasping end 184 are the shaft 2
2 and the same radius 88 passing through the rotation axis 4° of the holder z4. As described in VC below, due to this geometrical structure, when the tip @R4 and the surface 8z are engaged, the tip 8
The substantial radial motion component imparted to 4 is tx.

This makes it easier for the tip 84, which is preferably sloped, to grasp the tip of the paper product without causing any sliding between the tip R4 and the surface 8z. In addition, as will be described in detail below, the protruding part of the grasper 26 is made almost two-shaped, so that when the grasper z6 grasps the product, the tip R4 remains electrostatically charged. compensate for the increase in distance.

As shown in the figure, the tightening surface 8z is inclined so as to form an angle 1w with respect to the gripping tip R4. As a result, the tip 34 is moved from a position spaced apart from the gripping surface B2 to the gripping surface.
When rotating towards ABK.

The tip 84 approaches the grasping surface 8+i1 from a near vertical angle. However, the clamping surface R2 need not be located on the radius 88, i.e. perpendicular to the direction of approach of the grasping tip 84.
It does not have to be at an obtuse angle as shown in 1. It may also extend flush with the surface of the cylinder 10 if desired. Further, the tightening surface R2 is not provided as a part of the gripping device Wt14, and the tightening can be accomplished by forming the surface as a part of the cylinder 10 itself.

Figures 8a to 80 and 4a to 4c show diagrammatically the various configurations of the geometric configuration b'j of the invention at the moment of engagement of the clamping surfaces 82 and the ratio -λ. and j-(
When the 1 holder 24 goes further low, the luck of C is 1.

FIG. 4C shows a grip I having elastic grip fingers 26 according to the present invention! Isokai J) 4 Already shown. Solid layer 1. surface 8
During the rotation of 2, both! 1. The rigid holder 24 and the flexible holder 126 act as a linked, fully protruding and collinear sliding linkage as shown in FIG. 8a. When the holder z4 is rotated counterclockwise +u+, the tip 9484 of the grasping finger 26 strikes the hard surface 82. At the moment when the tip 84 aligns with the surface 82, the tip 84 connects to a point 8fl in the radial direction passing through the center of rotation 40, so when the holder 2.4 rotates completely, the clamping surface H21C is connected to the clamping surface H21C to grasp the product. - The elastic force of the finger 26 increases and the tip i
R4ff does not provide a radial motion component in any direction toward or away from the center of rotation 40.

Comparing the grasping mechanism shown in Figures 4b and 4C,
The bending point gtsb and Rflc are the tips of the grasping fingers 54bt
or R4c on the same radial line as shown in the corresponding crank mechanism shown in Figure 8c. i4b
In the arrangement shown in the figure, further rotation of the rank arm around the center of rotation 40b imparts a radial component of the movement to the tip R4b toward the center of rotation 40b. 8th C
In the figure, the engagement between the finger fifsc and the solid surface 82c is the tip k.
The radial motion component to s 4 c is applied to the outside VC away from the rotation center 40c.

In the rotational geometry of the invention illustrated in FIG. 8.4, the flexible force itself does not impart a radial component of movement to the tip 184 at the moment of engagement of the optical plane 84 with the surface 8z. Fourth
The shape of the grasping member is different from that shown in FIG.
No sliding occurs relative to 4.

As mentioned above, it is preferable that the gripping fingers 26 be made of spring rope 141, for example, to provide elasticity. Surface 82 or engagement 2, cam follow! When a rotational force is further applied to the holder by the ll111 member 27a, the tip 84 is pressed against the surface a 2 (yv the sheet of paper is inserted) K, and the product being grasped [7, i give. Point g tl &r +
The force that can be said is to bend the grip + M finger 2f14' so that it rotates slightly at point 8H. In this way, the rotation of point 86 reduces the distance between point H11 and element -84 by only f 4υ11
let If the rotational force is applied to the tip 84, the order and rotation of the holder z4 will be from the point 86 to the point 84. The second effective effect.

Preferably oT to compensate for the slight movement of point +411.
It's the part of the song that makes the tax-related finger f-1i-man-1ji extend. Zogeru. This finger is wide: 36 to compensate for the relatively small lin - 1 t. Even if there is, the rotation transmitted around point 40 is small (i.e. it does not push or pull the tip)
Applying an elastic holding force, the tip engages the product without sliding.

As shown in FIG. 1.21dK, the grasping finger z6 has a pair of reflectively oriented curved portions 4z and 44, which lie on either side of the line 88. This curved section 42, 44 connects the upper and lower fingers 4fi, 48, respectively, to the connecting part 50 and constitutes a bifurcated finger extension. upper and lower fingers fl
s4ts, 4g is radius [other than 90', tip 8
4 engages the longitudinal member surface 824C, the curved portion is made to be arched so that the portion 50 is arched. In the illustrated outline, the curved portion 44 curves inward, and the curved portion 4
6 is outside (Mll [bent.

Although specific finger configurations are shown and detailed, other configurations of spring members may be used to accommodate special grasping requirements. Preferably, the resilient fingers are capable of allowing a slight fx radial extension caused by further rotation of the bond holder between the tip 84 and the clamping surface 82. However, if this rotation is ignored and is not very stiff, Kla will occur.

The beveled surface of surface 88 also provides good grip. As shown, the clamping surface 8z is sloped relative to the collection cylinder 10 so that the printed sheet wraps around the beveled edge 82, increasing the umbrella contact 12 and keeping the leading edge of the sheet out of the air stream. move it. Since the shield tip 84 approaches at an obtuse angle close to a right angle compared to the corresponding engagement of the cylindrical surface of the converging cylinder lO, the rotational force is approximately matched in the direction of the spring gripping force.

Tighten the surface 8z first! 84, but this is not necessary when there is no component of the radial movement of grasping, as shown in Figure aX1. Therefore, the angle of %8 of the surface in the direction of movement of the tip is approximately 90
° less than 0.5°, which is desirable in some instances to also prevent creasing of the product. If available, the clamping surface may be flush with the surface of the cylinder IO.

Although preferred embodiments of the present invention have been described in detail in the above description, the present invention is not limited to these examples and can be modified in various ways within the scope of the claims.

[Brief explanation of the drawing]

Figure tIL1 is a partially cut-away cross-sectional view of the grasping mechanism of the sheet processing pupil of the present invention taken along a plane perpendicular to the axis of the collecting cylinder. FIG. 2 is a plan view of a portion of the grasping mechanism shown in FIG. 1. IE Ra-Rc is a diagram for explaining the motion transmitted by the grasping member of the device of the present invention. FIGS. 4a-4c correspond to FIGS. 8a-80 and are a diagram 1 for explaining the movements transmitted by the grasping member of the device of the invention. lO...Cylinder, 18...Arrow, 14...Grasping device. 16... Housing, 18... Tripod, 20... Pa end plate, z2... Gripping shaft, 24... Holder. sa, St%b * Z ts c ”・Understanding, 27
-・V bar, B? A...Cam support material, z8...Bolt, 89...Plate, 80...Rotating shield cam, 80a
...Cam surface, 82.81b, 81c"・Tightening is on the surface, 84, R4b, 84c"' tip. Rfl, 81'lb, 8Qc river point, aB-...radius, 4
0, 40 a, 40 b-・One rotation center. Patent applicant Motor Printing. Press company FIG, 3a FIG, 3b FIG, 4o FIG, 4bF/6.3c F/, 4(: 303-

Claims (1)

[Claims] L: A clamping surface for positioning paper and similar sheets, a holder supported against this surface, and this holder [fi! 17.
a grasping means having a grasping means terminating at the tip; and said Table I
and means for rotating the holder about an axis to rotate the nff tip along an arc such that the tip and the point and a radius VcIIi common to the pre-healing B self-arc) 5th position 1 and 1 [j# across the tightening surface and the tip y1 ridge to produce a sliding-free engagement of the sheet of paper. A grasping device for a sheet processing device characterized by: 9. The above-mentioned tightening device is a special device in which the surface is turned to the tip of iii and the corner IW is attached. & Apparatus according to claim 2 V (described in claim 2), in which the tip end thereof is formed into an inclined surface so as to engage with the ml before tightening. The device according to claim 2, wherein the finger is provided with curved portions located on both sides of the curved finger diameter and facing in opposite directions, according to claim 4, f. Apparatus: a. The front curved part connects to the upper and lower finger joints, forming a Z-shaped finger, and the upper and lower fingers are oriented in the radial direction at an angle of 90° to each other. is a device according to claim 5, wherein when the base end and the fastening surface engage, the ψI curve a section is curved. gripping means for gripping and releasing sheets of paper, the gripping means having a holder supported on a collection cylinder and a resilient gripping secured to the holder and projecting outwardly from a point on the holder and terminating at a tip; 'ri on the tightening surface
In the collecting cylinder of the sheet handling bag, the cylinder is provided with means for rotating the rotor around an axis for rotating the tip along an arc. , said tip and said constriction are generally located along a common radius of said arc, characterized in that they cause a sliding engagement of the sheet of paper located across the front clamping surface and the tip. Collecting cylinder for sheet processing bags…folding machines. & A collection cylinder according to claim 7, wherein the clamping surface is angled towards the tip. 9. Tightening table 1 above. i! IVc Kyoen 1-te Katsura
Collection cylinder as described in section. la outside tU+1 table Il in said collection cylinder! Patent claim 811. s Collection cylinder as described in IAK. IL The yield cylinder according to claim 1O VC, wherein a grasping mechanism attached to the collecting cylinder is provided for the grasping means. 11. A collecting cylinder according to claim 10, wherein the collecting surface K Am is formed on the collecting cylinder. 1. A collection cylinder as claimed in claim 10, which is provided with a curved section giving a limited radial extension to the front finger. 14. A collection cylinder as claimed in claim 1R, wherein the front finger has a pair of oppositely ascending halves τ curvature located on opposite sides of said radius. 11 The curved portion is connected to the upper and lower finger connecting portions to form a Z-shaped finger, and the upper and lower fingers are oriented at an angle other than 90° to the radius with respect to the tip. Claim 'ai!' wherein the curved portion is curved upon engagement with the clamping surface. , a collection cylinder according to paragraph 14.